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at91sam9263_spi.c 2.16 KiB
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  • /*
     * (C) Copyright 2007-2008
     * Stelian Pop <stelian.pop@leadtechdesign.com>
     * Lead Tech Design <www.leadtechdesign.com>
     *
     * See file CREDITS for list of people who contributed to this
     * project.
     *
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License as
     * published by the Free Software Foundation; either version 2 of
     * the License, or (at your option) any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program; if not, write to the Free Software
     * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
     * MA 02111-1307 USA
     */
    
    #include <common.h>
    #include <asm/arch/at91_common.h>
    #include <asm/arch/at91_pmc.h>
    #include <asm/arch/gpio.h>
    #include <asm/arch/io.h>
    
    void at91_spi0_hw_init(unsigned long cs_mask)
    {
    	at91_set_B_periph(AT91_PIN_PA0, 0);	/* SPI0_MISO */
    	at91_set_B_periph(AT91_PIN_PA1, 0);	/* SPI0_MOSI */
    	at91_set_B_periph(AT91_PIN_PA2, 0);	/* SPI0_SPCK */
    
    	/* Enable clock */
    	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9263_ID_SPI0);
    
    	if (cs_mask & (1 << 0)) {
    		at91_set_gpio_output(AT91_PIN_PA5, 1);
    	}
    	if (cs_mask & (1 << 1)) {
    		at91_set_gpio_output(AT91_PIN_PA3, 1);
    	}
    	if (cs_mask & (1 << 2)) {
    		at91_set_gpio_output(AT91_PIN_PA4, 1);
    	}
    	if (cs_mask & (1 << 3)) {
    		at91_set_gpio_output(AT91_PIN_PB11, 1);
    	}
    }
    
    void at91_spi1_hw_init(unsigned long cs_mask)
    {
    	at91_set_A_periph(AT91_PIN_PB12, 0);	/* SPI1_MISO */
    	at91_set_A_periph(AT91_PIN_PB13, 0);	/* SPI1_MOSI */
    	at91_set_A_periph(AT91_PIN_PB14, 0);	/* SPI1_SPCK */
    
    	/* Enable clock */
    	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9263_ID_SPI1);
    
    	if (cs_mask & (1 << 0)) {
    		at91_set_gpio_output(AT91_PIN_PB15, 1);
    	}
    	if (cs_mask & (1 << 1)) {
    		at91_set_gpio_output(AT91_PIN_PB16, 1);
    	}
    	if (cs_mask & (1 << 2)) {
    		at91_set_gpio_output(AT91_PIN_PB17, 1);
    	}
    	if (cs_mask & (1 << 3)) {
    		at91_set_gpio_output(AT91_PIN_PB18, 1);
    	}
    }